Javascript's window.open function inconsistent, does not open pop up when expected

问题

Ok, I'm going nuts here. I'm trying to implement a basic popup window to display images. If my javascript code is fully specified in an HTML tag with the onclick property, the window pops up correctly. If my IDENTICAL javascript code is called from either the script tag at the beginning of the HTML document or from a separate js file, the link (or image in my case) opens not in a popup, but in the same window. < frustration >

This opens a popup:

<a href="test.jpg" onclick="window.open('test.jpg','test_name','width=500,height=500,scrollbars=no'); return false">test_name</a>

This does not open a popup:

function cleanPopup(url, title) {
window.open(url, title, 'width=500,height=500,scrollbars=no');
return false;
}

<a href="test.jpg" onclick="return cleanPopup('test.jpg', 'test_name')">test_name</a>

Any help would be appreciated.

PS: Tested in Chrome and Firefox.

EDIT:

I've discovered my problem. I originally only called the js file in the head tag. There is something about the layers of div's when created with multiple scripts of a templating tool (Template Toolkit in my case) that makes the original script element within the head element seemingly invisible to the deeper child elements.

I do not know exactly what's going on, and I don't have the time to explore it. I've added this edit just in case some other person has a similar issue and somehow stumbles across this thread. If someone understands this phenomenon, and can explain it, please do.

EDIT 2:

The "name" parameter of the window.open method can not contain spaces for the popup to work in IE. Thanks M$.

回答1:

DEMO HERE

This code is the closest to foolproof you can get in my opinion.

Tested on

Windows - Fx, Chrome, IE8 and Safari
iPhone: Mobile Safari

adding a target makes the link open in a new window or tab if allowed - in case the script fails for any reason - this is a SIDE-EFFECT which is useful but not the answer to the question.
returning true if the window.open fails will also make the click follow the link, hopefully invoking the target - Note that some browsers no longer reacts to target.
the height (and width) in the 3rd parameters will enforce the opening in a new window rather than a new tab unless the browser is set to open all new windows in a tab

<html>
<head>
<script type="text/javascript">
window.onload=function() {
 document.getElementById('popup').onclick=function() {
   var w = window.open(this.href, this.target, 
       'width=500,height=500,scrollbars=no');
    return (!w); // opens in new window/tab if allowed
  }
}
</script>
</head>
<body>

<a id="popup" href="test.jpg" target="test_name">test_name</a>
</body>
</html>

回答2:

use target="_blank"

<a href="whatever" target="_blank"> ...

from HTML, or

window.open(url, '_blank', options)

from javascript

回答3:

Make new window title random

onclick="PopupCenter(this.href,'random','600','700','yes'); return false;"

and in function:

if(title=='random')
{
title = randomID();
}

回答4:

try this

function mypopup()
{
    mywindow = window.open("http://www.test.com", "mywindow", "location=1,status=1,scrollbars=1,  width=100,height=100");
}

回答5:

Make sure you put your javascript code in the Head block

<head>
<script type="text/javascript" language="JavaScript">
function cleanPopup(url, title) {
    window.open(url, title, 'width=500,height=500,scrollbars=no');
    return false;
}
</script>

And in the body:

<a href="" onclick="cleanPopup('test.jpg','test_name')">test_name</a>

It just work for me without any problem both in Firefox and IE

来源：https://stackoverflow.com/questions/10086811/javascripts-window-open-function-inconsistent-does-not-open-pop-up-when-expect

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javascript

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